20Xe Air Flow Meter Adjustment Screw

[Andy]

Was talking to a lad t'other night who informed me the previous owner of my engine has faffed with the adjustment screw on the AFM previously.
Just wanted to know if this would be linked to it being hesitant and popping at low revs,soon as its floored its fine,ticks over at 1500rpm occasionaly aswell.:roll:
So just wondering if that would cause those problems and if i can put it back to where it should be? or is it a case of a new AFM?
Any help/advice is always appreciated:thumb:

[comptoncj]

Has the tamper proof cover been removed?

[Rickardo]

Andy, I have a spare afm if you need it.

[GRUNT 16V]

that screw adjust the electrical resistance in the air flow metre ! some have a screw and some dont !

[Andy]

Yes the tamper cover has been removed.no idea which way its been turned.rickardo,is that for a dizzy xe or coilpack or are they the same? If it will work on mine (dizzy) pm me how much please.

[Andy]

In about what position should it be grant?

[Sloth]

dizzy is different to dispak. andy, you need gas testing equip, then turn the screw. it needs setting in the right range. i have the xe manual at home will post tonight mate.

[Andy]

Would that being in the wrong position cause the problems im describing?

[Sloth]

possibly, i its been adjusted massively it will be telling the ecu there iant any air going on, so it dumps loads of fuel in. :thumb:

[GRUNT 16V]

In about what position should it be grant?
You will need a multimetre to get it to the right position !

[Andy]

You will need a multimetre to get it to the right position !
Ok,could you describe what i need to do please as im pretty useless with electronics tbh,ie where to test and what it should read?
many thanks for the replies:thumb:

[Sloth]

a\ndy, i have scanned the haynes, i'll post when they upload onto pb....

[Andy]

cheers mate

[Sloth]

here ya go mate

http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/img473.jpg

http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/img474.jpg

http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/img475.jpg

http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/img476.jpg

last one is the wiring diag mate for a 1990 cav. right hand side is the xe wiring.

[Andy]

thanks mate,that must have taken ages!!!

[Sloth]

nah mate pb took ages, i have the haynes on the bedside table....

[Andy]

why do i need a tacho? i dont drive a lorry? lol

[Sloth]

tacho = rev counter lol

[Sloth]

if you need owt else gimmie a shout ;)

[Andy]

tacho = rev counter lol
:roll: i know im taking the pi5s lol

but obviously i dont have a gas analyser:(

[Sloth]

ah bum, iirc quick fit in scarbro will let you use theirs for 25 quid.

[Andy]

i'll see.Getting another one off Rickardo at Pvs so i'll try that.
Thanks for all your help Rob,btw did spudnik pick up that diag port off you last week?

[Sloth]

yep, he has it in teh vec..... if you speak to him get him to text me, tis important ;0